My Bloody Valentine is a 1981 Canadian slasher film released in the wake of the popularity of the slasher genre that had overtaken the 1970s. Considered an example of the low-budget cult films reminiscent of popular slasher films such as Halloween (1978) and Friday the 13th (1980), the movie was filmed on location in Sydney Mines, Nova Scotia Canada.

The movie is infamous for having had 9 minutes cut by the MPAA due to the amount of violence and gore. Though co-producer Dunning confirmed that the excised footage still existed, attempts to release it proved difficult as Paramount Pictures refused to offer an uncut version. Lionsgate subsequently secured DVD rights to the film (as well as several other Paramount features) and released the uncut version on January 13, 2009.